1.   If the vaccine is effective, it could substantially alter the debate about how the nation should prepare for a possible attack by terrorists using smallpox.

2.   Instead, doses will be kept in government stockpiles, for use if terrorists use smallpox as a weapon.

3.   Officials at the CDC today say they have no evidence of a forthcoming terrorist attack using smallpox.

4.   The debate over vaccinating the population against a bio-terrorism attack using smallpox is intensifying.

5.   Yes, we know that the risk of a terrorist attack using smallpox is considered small and thus perhaps not worth the risk of taking the vaccine.